Piston-ring tool



A. F. REED.

PISTON RING TOOL- APPLICATION FILED AUG-4, 1920.

1,395,140. Patented Oct. 25, 1921.

UNITED STATES ALBERT F. REED, OF WAPELLO, IOWA.

PISTON-RING TOOL.

To all whom it may concern:

Be it known that I, ALBERT F. REED, a citizen of the United States, residing at 'VVapello, in the county of Louisa and State of Iowa, have invented certain new and useful Improvements in a Piston-Ring Tool, of which the following is a specification.

This invention relates to devices for placing piston rings upon piston heads, and has for one of its objects to simplify and improve the construction, and increase the efiiciency and utility of devices of this char.- acter.

Another object of the invention is to provide a device of this character which may be adapted without structural change to pistons and piston rings of various sizes and forms.

With these and other objects in view, the invention consists in certain novel features of construction as hereinafter shown and described and then specifically pointed out in'the claims, and in the drawings illustrative of the preferred embodiment of the invention.

Figure 1 is a vertical sectional View of the improved device together with a portion of a piston head and a plurality of piston rin s.

ig. 2 is a plan View of the parts shown in Fig. 1,

Fig. 3 is a detached perspective view of the expansible sleeve or cylinder.

The improved device includes a sleeve or cylinder 10 of sheet metal, preferably steel divided, longitudinally and with the portions of the sleeve adjacent to the division overlapping, as shown at 11.

Attached to the inner face of the sleeve at diametrically opposite points are notched or toothed bars 12.

Disposed within the sleeve 10 is a standard or rod represented as a whole at 18 and with a portion threaded, as shown at 14.

Engaging the threaded part of the rod is a cylinder nut 15, and slidable on the un threaded part of the rod is a sleeve 16.

At its upper end the rod 13 is provided with a turning knob or handle 17 and surrounding the rod between the knob 17 and the sleeve 16 is a spring 18.

A pull rod 19 is attached to the sleeve 16 and terminates at the upper end with an outturned finger grip 20.

Specification of Letters Patent.

Patented Oct. 25, 1921.

Application filed August 4,1920. Serial No. 401,142.

Pivoted at 21 to the nut 15, preferably at opposite sides thereof, are bars 22 having chisel shaped outer ends to engage the notches of the bars 12.

Pivoted at 23 and 24 respectively to the sleeve 16 and the bars 22, are brace arms 25.

Attached to the lower end of the rod 13 is a bearing disk or foot 26, preferably of the form shown to engage the upper end of the piston represented at 27, to which the rings are to be applied, the piston having the usual ring receiving channels or seats 28.

A plurality of the piston rings are represented conventionally at 29 and are of the divided or spring form.

With a device thus constructed, the operation is as follows:

The sleeve 10 in contracted form is disposed within one or more of the piston rings 29 when detached from the piston and which are therefore also contracted.

The pull member 19 is then actuated to draw the sleeve 16 toward the knob 17 against the resistance of the spring 18, which movement draws the free ends of the bars 22 toward each other so that the rod and its attachments can be inserted within the expansible member 10. The pull member 19 is then released when the reaction of the spring 18 will move the sleeve 16 toward the nut 15 and expand the bars 22 to cause their outer ends to en age a air of the notches in the bars 12. [he kno 17 is then rotated to cause the threaded portion 14 of the rod 13 to force the bars 22 outwardly and correspondingly expand the sleeve 10 and the piston rings carried thereby.

When the expansion is sufficient to enable the sleeve 10 to be passed over the piston, this is done, and the spring engaged with the upper face of-the piston.

Thereafter the sleeve 10 and the piston rings 29 may be expanded suiiiciently to enable the rings to be seated in the channels 28 as will be obvious.

The improved device is simple in construction, can be inexpensively manufactured and operates effectually for the purpose described.

The preferred embodiment of the invention is disclosed in the drawings and set forth in the specification, but it will be understood that any modifications within the scope of the claims may be made in the inner face of said cylinder, a rod within the construction without departing from the principle of the, invention or sacrificing any of its advantages. a I claim:

1. An implement of the class described comprising a continuous plate of resilient material bent into cylindrical form with the ends overlapping and adapted to be disposed within a piston ring, and means for expanding the cylindrical plate to correspondin ly expand the pistonrlng to enable it to be isposed upon the piston.

2. An implement of the class described comprising an expansible cylinder adapted to be disposed within a piston ring, a plurality of toothed standards attached to the cylinder and having a portion threaded, a nut engaging the threaded portion of the rod, a sleeve slidable upon the unthreaded portion of the rod, spreader bars pivoted to the nut and engaging the teeth of the standards, links pivotally connected to the spreader bars and to the sleeve, a spring operating against the sleeve, and a pull member connected to the sleeve.

I 3. An' implement of the class described the rod to cause said spreader members to expand the cylinder.

4. An implement of the class described comprising an expansible cylinder adapted to be disposed within a piston ring, a plurality of toothed standards attached to the cylinder, a threaded rod within the cylinder, a nut engaging the threaded rod spreader members pivoted to said nut and adapted to engage the teeth of said standard, and means for rotating said rod to cause said spreader members to expand the cylinder.

In testimony whereof, I afiix my signature hereto.

ALBERT F. REED. 

